From 6e15d0e04bfeaa5662a289ee915273307326e45a Mon Sep 17 00:00:00 2001 From: Sudeep KarkadaNagesha Date: Mon, 21 Oct 2013 13:29:42 +0100 Subject: [PATCH] ARM64: DT: define ARM64 specific arch_match_cpu_phys_id OF/DT core library provides architecture specific hook to match the logical cpu index with the corresponding physical identifier. On ARM64, the MPIDR_EL1 contains specific bitfields(MPIDR_EL1.Aff{3..0}) which uniquely identify a CPU, in addition to some non-identifying information and reserved bits. The ARM cpu binding defines the 'reg' property to only contain the affinity bits, and any cpu nodes with other bits set in their 'reg' entry are skipped. This patch overrides the weak definition of arch_match_cpu_phys_id with ARM64 specific version using MPIDR_EL1.Aff{3..0} as cpu physical identifiers. Signed-off-by: Sudeep KarkadaNagesha Acked-by: Mark Rutland Cc: Will Deacon Signed-off-by: Catalin Marinas --- arch/arm64/kernel/setup.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c index fa6faf564da2..9cf30f49610d 100644 --- a/arch/arm64/kernel/setup.c +++ b/arch/arm64/kernel/setup.c @@ -98,6 +98,11 @@ void __init early_print(const char *str, ...) printk("%s", buf); } +bool arch_match_cpu_phys_id(int cpu, u64 phys_id) +{ + return phys_id == cpu_logical_map(cpu); +} + static void __init setup_processor(void) { struct cpu_info *cpu_info; -- 2.20.1